Log bunk



Dec 239 I! F. W. CH RISWELL LOG BUNK Filed April 24, 1924 Patented Dec. 23, 1924.

. UNITED STATES PATENT OFFICE.

FREDERICK W.` CHRISWELL, 0F SEATTLE, WASHINGTON, ASSIGNOR TO PACIFIC CAR AND FOUNDRY COMPANY, OF SEATTLE, WASHINGTON, A CORPORATION OF WASH- A INGTON.

LOG BUNK.

Application filed April 24, 1924 Serial N o. 708,720.

To all whom t may concern.'

Be it known that I, FREDERICK W. 'CHRIS- wELL, a citizen of the United States of America, and resident of the city of Seattle, in the county of King and State of Tashington, have invented certain new and useful Improvements in Log Bunks, of which the following is a specification.

My invention relates to log bunks and consists of an improved type of construction in which standard rolled shapes are employed to cheaply produce a strong and rugged bunk and one which is excellently adapted for use under certain conditions.

The object of my inventio-n is to cheaply produce a bunk which is especially adapted for use on cars in hauling heavy logs where the conditions do not require that the bunk shall dog or cut into the logs to prevent endwise sliding of the logs over the bunks. The invention consists of a bunk co-nstructed of certain shapes of beams combined together in a novel manner, -whereby a superior bunk is made.

In the accompanying drawings ll have shown my invention in the form of construction which is new preferred.

Figure 1' is a side sectional elevation taken through the bunk lengthwise thereof, showing the checks in place.

Figure 2 is an end elevation of the bunk, the same being taken from the end which is at the right in Figure 1.

Figure 3 is a top or plan view of the right hand end of theY bunk as shown in Figure 1.

The bunk which is the subject of this invention is designed for application to railroad flat cars for the purpose of adapting them for hauling logs. rlhe bunk is', of course,' adapted for application to motor trucks trailers or other vehicles when used for hauling logs or like products which may 'be held in place by the use of checks. l/Vhile the invention will be described as applied-to bunks on cars, it is to be understood that `it is intended to cover a bunk and chock applied for any `use to which such objects are kknown to be adapted. t

The frame of the bunk, in the type of construction shown and now preferred, comprises two side webs *1, each of these being composed of a bulb angle placed with the broad atflange 10 downward and in horizontal position, and with the bulbs 11 at their upper edges. These two bulb angles are connected by an I-beam 14, which is placed with its web horizontal and sufii.

ltransmit draft between the bunks.

lf, however, the bunk is designed for application to trucks which are not per mancntly connected but which are connected for draft purposes by the logs applied theretopthen the preferred location of the I-beam 14 would be that in which the edge of its upper flanges would project well above the upper edge of the bulb angles, thereby forming a sharp edge which will dig into the logs and thus prevent their movement across the bunks and provide for the traction between the two trncks connected by the logs.

The I-beam 14 is provided neareach end witha. slot 12. At one end a chock 2, which is of metal forming a trough-like section or an approxin'iation to a V-shapc, is placed in the channel which lies between the opposite flanges of the I-beam. This chock is of old construction. lt has an arm .20 which, extends downward through the slot 12 in thell-beam and to this arm is connected a chain 3, which is of sufficient length to extend to the opposite'end of the bunk and to project therefrom a sufficient distance .to provide for dogging or holding the chain. At the end of the bunk from which the chain 3 pro-jects, one of the bulb angles or side webs of the completed bunk is preferably provided with a notch or recess 13 to accommodate the cha-in when the same is bent around to one side. At the same side of the web is secured a chain holding dog 4;. This dog is provided with an upwardly extending web or flange 40 and with an opof a link of the. chain 3 between them when 'posed flange 41, the edges of the two being separated sufficiently to permit the placing placed edgewise with relation thereto, and not far enough apart to permit the neXt link which is in a plane at right angles to pass through. This forms a dog capable of engaging the chain and holding it, at intervals represented by the length of a single link.

I have shown at the other end of the bunk, a chock of somewhat different construction, which may be used in connection with the chock just described. This chock 5 comprises two right angularly positioned plates which are connected at their ends by cross webs 51. The construction of this is clearly shown in the various views. The web which is placed vertical with rela-tion to the bunk, is provided with a chain-receiving opening having a narrower slot 52 extending to a lower point. This slot 52 is of such width as to receive the chain when inserted edgewise therein and to form a stop for the chain, to thereby prevent the chock being moved farther outward. The chain 6, which is associated with the chock 5, has one end ixedly secured to the bunk well inward from its outer end, as by the use of a staple or ring 60. The chock 5 may be moved back and forth for a distance corresponding approximately with the length of the slot 12 at this end of the bunk. It may be locked in any position desired, within limitations imposed by the lengths of the links of the chain.

Spacing plates 7 are secured between the side webs of the bunk at each end. These serve both as supports for the side webs and also as means for additionally locking and holding the chain 3 which is connected with the chock 2. These plates 7 are provided with an opening 70, of ample capacity to permit free passage of the chock-retaining chain 3, and at one side, being the side to which the chain-holding dog 4 is secured, are preferably provided with a slot 71 of a size to receive the links of the chain when entered edgewise therein. This forms a dog for resisting movement of the chock 2 towards the opposite end of the bunk. The dog 4, which is placed outside of the bunk, forms an additional or safety lock which will prevent the chain from moving horizontally out of the slot 71.

The bulb edge of the angle is sufficiently broad and its edges are somewhat rounded, so that it does not cut into the logs placed thereon to such extent as to mar or dig into the log. At the same time they Will be compressed into relatively soft bark and also engage sound wood in such manner as to hold the logs from endwise movement over the bunk such as is produced by coupling and shunting the cars and application of brakes to the cars and the jerks of starting a train.

The bulb at the upper edge of the angles gives the bulk of metal needed to give strength to resist weights placed thereon while furnishing a rounded o-r relatively smooth surface for engagement with the logs, while the I-beam riveted to the bulb angles gives the strength to resist side strains and-furnishes a web upon which to support the chocks. The position of the I-beam close to the upper edge of the bulb angles provides the reinforcement against stresses acting horizontally and transversely of the bunk, close to the point where they would be applied.

What I claim as my invention is:

1. A log bunk having its side webs composed of bulb angles placed with the bulb upward andthe base lflanges extending outwardly, an I-beam having its web placed horizontally and connecting the bulb angles close to their upper edges.

2. A log bunk having its side Webs composed of two bulb angles placed with their bulbs uppermost and base flanges extending outwardly, an I-beam with its web horizontal and its downwardly-extending base flanges riveted to the inner faces of the bulb angles near their upper edges, the web of the I-beam having a longitudinally extending slot near each end and spacing plates conl necting the bunk sides beneath the I-beam.

Signed at Seattle, King County, Washington, this 20th dayof March, 1924.

FREDERICK w. oHRIswELL. 

